Public bug reported:
Binary package hint: grub-installer
Background:
I have a GA-X58A-UD7 motherboard, and wanted to plug my boot SSD into one of
the SATA3 slots, and use the SATA2 connections for external drives. It was
also convenient to do so because of mechanical interference between the SATA
cables and the graphics card - the cables are of limited length, and they route
better if the external back panel connector is routed to the first SATA plug.
So my boot drive shows up as a higher /dev/sd#, usually e or f.
I created a separate EXT4 partition for /boot and used btrfs for the
root file system, as well as /usr and /var which are mounted on separate
drives.
When I did the install and booted all was well at first, until I tried
to boot with an external drive or USB thumb drive plugged in. The
system would then fail to find its root partition or one of the other
drives. I found that grub was configured to search for root on a fixed
/dev/sd# instead of using UUIDs. Obviously this would fail if another
drive was inserted and the drive letters move.
** Affects: grub-installer (Ubuntu)
Importance: Undecided
Status: New
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When selecting btrfs for root filesystems, grub doesn't use UUIDs
https://bugs.launchpad.net/bugs/678150
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